Tube-header.



Patentad Sept; I9, |899.

, M. CORYELL.

i TUBE HEADER. {Applicatiqnv led June 21, 1 899.)

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E! *Q 2km. Emmi /V VENTOH mmgmy Z Wfl/12570 No. 633,337. Patented Sept.I9, |899.

M. CRYELL.

TUBE HEADER. lApplicmon filed Jun@ 21,v 1899.) (No Modal.) 2Sheets-Sheet 2,

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UNITED STATES yPATENT O Frrcn.

MIERS CORYELL, OF NEW YORK, N. Y.

TUBE-HEADER.

SPECIFICATION forming part of Letters Patent N o. 633,337', datedSeptember 19, 1899.

Application filed Jnne 21, 1899.

T0 all whom, it may concern:

Be it known that I, MIERs CORYELL, a citi- Zen of the United States, anda resident of the borough ot' Manhattan, city, county, and State of NewYork, have invented certain new and useful Improvements in Tube-Headersfor Boilers and the Like, of which the following is a full, clear, andexact description, reference being had to the accompanying drawings,forming part of this specification.

My invention relates to boilers of the Watertube class in which thetubes are arranged in sections or elements, and although its use is notrestricted thereto it is particularly adapted to the well-knownBelleville A boiler.

In connection with the description of my invention it is to beunderstood that I do not intend to limit its use to what is generallyknown as a steam-boiler, since it is adapted for other similarstructures-such as heaters, condensers, evaporators, dac.; but forconvenience I will describe the invention as applied to a sectionalwater-tube boiler of the Belleville type. In these boilers the tubes arearranged in sets or elements and the water entering the lower tube ofeach element or section ows back and forth through the furnace orcombustion-chamber in an ascending column and the steam from each set oftubes passes into a collector or drum above the tubes. Some means fordirecting the circulation and compelling the Water and steam to passdirectly from one tube to another are therefore essential and areusually provided in the form of cast couplings, into which the adjacentends of the tubes are secured. These couplings are usually termedheaders or junction-boxes, and until recentlyhave usually beenconstructed of cast metal and the tube ends were secured therein bythreaded joints; but the increasing employment of higher steam-pressureshas demonstrated that this method of construction is unreliable, and itis now almost imperative that castings and threaded joints should bediscarded in practial and efficient boiler construction. The

object of my invention is the accomplishment of this result-that is tosay, to provide a header forsectional Water-tube boilers Which may beconstructed and tted in place economically and efficiently and which maybe made entirely of Wrought or forgedmetal instead of being cast, thus.permitting the tube Serial No. 721,401. (No model.)

ends to be expanded into the headers instead of being secured therein bythreaded joints.

In the accompanying drawings, Figure vl is a side view, partly insection, of a structure embodying my invention. Fig. 2 is a front view,also partly in section. Fig. 3 is ahorizontal section on the line 3 3,Fig. 2. Fig. 4 is a front view, also partly in section, of a modifiedconstruction. Fig. 5 is a horizontal section on the line 5 5, Fig. 4.Figs. 6 and? show details of construction. f

Similar reference characters are employed to designate correspondingparts in all the views.

In the drawings, A is the front header, B the direct tubes leading tothe rear header C, and B' are the return-tubes leading from the rear tothe front header. For convenience I have shown only four tiers or pairsof tubes; but in practice a greater number is usually employed. Thewater enters through the inlet b, passes through the lower tube B intothe rear header, thence into the other tube B of this pair to the frontheader, and so on until it enters the steam drum or collector (notshown) at the top of the boiler in the form of steam.

The header A is constructed of wrought or forged metal and may be madeof wrought steel or iron tubes rectangular in cross-section. The ends aa' are secured in place by Welding, and the rear Wall of the box-likestructure forming the headeris suitably offset, as shown in dottedlines, to receive the tubes at right angles. The tube-holes d2 are thenformed in the offset portions of therear header, and suitable hand-holesa3 are provided in the front wall of the header, which are fitted toreceive the hand-hole covers a4, which are secured in place by the yokesa5, bolts a6, and nuts a7 in the usual manner. Within the header andbetween the different pairs of tubes is secured a plate D, which tsclosely to the sides of the header and forms a horizontal partitionacross the same. As the function of these plates is the division of theheader into as many separate compartments as there are pairs of tubes inthe element, I use the term separator-plates to designate them. Asshown, each of the separatorplates D consists of four separate plates d,formed to encircle the stay-bolts d' and to en- `gage the stay-bolts d2,all which pass through IOO .header-walls and the stay-bolts.

the header. The plates d are preferably just long enough to pass throughthe tube-holes a2 before the tubes are secured therein and after beingfitted in place around the staybolts are secured there by the bolts d3.It is not in all cases essential that the edges of the separator-platesD and the walls of the header should meet in an absolutely-tight joint;but where such a joint is desirable or necessary I place between theplates d a thin sheet or disk of copper or other suitable material d4,slightly dished in form and in its dished form of the same size as thespaces formed by the As the plates d are drawn together by the bolts d3the disks d4 are flattened out and their edges are forced tightlyagainst the header-walls and the bolts and insure a tight joint at allpoints. These disks d4 are shown in section in Fig. 6, and Fig. 3contains a plan View of two of them.

The headers are placed side by side, there being as many pairs ofheaders as there are sections or elements in the boiler, and in order tofacilitate the cleaning of the exterior of the tubes I corrugate thesides of the front headers, as shown in Fig. 2, thus furnishing anopening E between the headers through which the cleaning implements maybe inserted and operated. In Figs. 4and 5 I have shown a modifiedconstruction in which the corrugations are dispensed with and thestaybolts d2 are made hollow and of increased diameter. In this modifiedstructure the cleaning implements are inserted and operated through thehollow stay-bolt CF. This modication permits the use for the headers ofrectangular wrought tubes which can be purchased in lengths and savesthe expense of the special forging required to produce the corrugations.

The stay-bolts d d2 are, as shown, suitably headed to receive awrench,which, if desired, will permit the removal of the bolts. The endsof said bolts preferably project slightly beyond the walls of theheader, so that they may be upset against the header-walls whereextraordinarily high pressures are employed, thus strengthening thestructure and obviating any possibility of leakage at this point.

It is to be understood that the rear header C is similarin constructionto the front header B except that no inlet-opening is provided, and asno means are required for permitting access to the interior through therear header the hand-holes and corrugations or hollow stay-bolts areomitted.

One important advantage of my invention is the facility with which adefect either in the metal forming the header or in the welding thereofmay be detected before the expense of the labor required to erect theheader in place has been incurred. After the boxlike structureconstituting the header has been formed and the ends welded in andbefore any of the tube or hand holes have been formed therein it may beconnected with the hydrostatic testing apparatus and subjected to theusual test, and if any defect exists in the structure it will berevealed before the expense required to erect and connect the header hasbeen incurred. This particular advantage would not of course be achievedwhere it is desired to form the defiector-plates D of one piece insteadof a number of separate pieces, as shown. In such case theseparater-plates D may each be made of a casting bolts passing throughthe walls of the header and a separately-constructed separator-plate,carried by said bolts and fitting the interior walls of the header,substantially as shown and described.

2. In a header for water-tube boilers and the like, the combination of abox-like structure formed to receive one end of the tubes in eachelement, a series of bolts passing through the walls of said header anda separate plate constructed in sections and secu red within the headerby said bolts, substantially as shown and described.

3. In a water-tube boiler or like structure, the combination with aseries of tubes forming an element arranged so that the adjacent ends ofeach pair lie in the same horizontal plane, of a box-like structurewithin which all the adjacent tube ends of the element are secured, aseries of plates and a series of bolts securing said plates in place toform horizontal partitions in the header and separate the tubes intopairs, substantially as shown and described.

4. In a header for water-tube boilers and the like, the combination of abox-like structure formed to receive the tube ends, a series ofseparator-plates fitting the interior walls of the header, a series ofhollow stay-bolts serving to support said plates and extending throughthe walls of the header, substantially as shown and described.

5. In a header for water-tube boilers and the like, the combination of abox-like structure formed to receive the tube ends, a series of boltspassing through the walls of said header, a separatorplate formed insections having opposing fiat surfaces, a dished metal disk arrangedbetween said surfaces and means for clamping said disk between saidsurfaces and causing it to engage the interior walls of the header,substantially as shown and described. l

MIERS CORYELL.

Vitnesses:

S. G. METCALF, IVM. J. HANDovEr..

IZO

